\begin{myenv}
    \begin{abstract}
        % This is a very very long
        % trailing comment that needs to
        % be wrapped by latexindent to
        % make sure the visual display
        % is in a good shape. Second
        % comment Third is a very very
        % long trailing comment that
        % needs to be wrapped by
        % latexindent to make sure the
        % visual display is in a good
        % shape. fourth comment 

        % This is a very very long
        % trailing comment that needs to
        % be wrapped by latexindent to
        % make sure the visual display
        % is in a good shape. Second
        % comment Third is a very very
        % long trailing comment that
        % needs to be wrapped by
        % latexindent to make sure the
        % visual display is in a good
        % shape. fourth comment 
    \end{abstract}
\end{myenv}
----|----|----|----|----|----|----|----|
   5   10   15   20   25   30   35   40